greenchild623 Group Title need help with system: -14=-2=y-7x 2x=10y +4 PLEASE HELP!!!! 2 years ago 2 years ago

1. eashmore Group Title

What do you need to do with the system?

2. greenchild623 Group Title

solve for x and y

3. eashmore Group Title

Is the system$\begin{matrix}-14 - 2 = y-7x \\ 2x = 10y + 4\end{matrix}$

4. eashmore Group Title

Do you have to use any particular method?

5. greenchild623 Group Title

sorry.... it is: -14=-20y-7x 10y +4 = 2x

6. greenchild623 Group Title

solve by elimination....

7. greenchild623 Group Title

(sigh...)

8. eashmore Group Title

Weird. I replied to this but my answer isn't showing up. Let me re-type it real fast.

9. greenchild623 Group Title

'k

10. eashmore Group Title

First, we need to solve the first equation for x. We get$x = -(20/7)y + 2$ Then we substitute this expression into the second equation. This yields $10y - 2(-(20/7)y + 2) = -4$Solve this for y and plug the value of y back into our expression for x. Let me know what you get.

11. greenchild623 Group Title

x=34 y=?